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    • 1. 发明授权
    • Electric dimming device and its driving method
    • 电动调光装置及其驱动方法
    • US07230598B2
    • 2007-06-12
    • US10311656
    • 2002-04-19
    • Masaru KawabataToru UdakaToshiharu YanagidaToshifumi TakaokaKazuhiro Tanaka
    • Masaru KawabataToru UdakaToshiharu YanagidaToshifumi TakaokaKazuhiro Tanaka
    • G09G3/36
    • H04N5/238G02F1/13306G02F1/133528G02F1/13725
    • An electrical dimmer device and its driving method applicable to, for example, an image pickup unit and a display unit operate so that when a control signal for stop adjustment is changed from its current value of stop adjustment to a larger value, which occurs when the light transmissivity of a positive type liquid crystal is raised, or when the light transmissivity of a negative type liquid crystal is lowered, the control signal is temporarily varied to an intermediate value that is larger than the larger value. The energy of the varied larger value and a time during which that varied value is applied are determined in accordance with predetermined values. By doing so, it is possible to make a response speed when changing the light transmissivity extremely faster and thus attain a response time, of for example, one field period of time or less required for a stop mechanism of a video camera.
    • 适用于例如图像拾取单元和显示单元的电气调光装置及其驱动方法进行操作,使得当用于停止调整的控制信号从其当前的停止调整值改变为更大的值时 正型液晶的透光率提高,或者当负型液晶的透光率降低时,控制信号暂时变化为大于较大值的中间值。 根据预定值确定变化的较大值的能量和施加该变化值的时间。 通过这样做,可以更快地改变光透射率时作出响应速度,从而获得例如对于摄像机的停止机构所要求的一个场周期或更短的响应时间。